The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| Event typeevent_type | Heavy Rain |
|---|---|
| NOAA NCEI event IDncei_event_id | 380,842 |
| Episode IDepisode_id | 62,870 |
| Begin UTCbegin_utc | 2012-05-19T12:00:00+00:00 |
| End UTCend_utc | 2012-05-20T12:00:00+00:00 |
| Statestate | NEBRASKA |
| County/zone typecz_type | C |
| County/zone namecz_name | GREELEY |
| Latitudelat | 41.573 |
| Longitudelon | -98.429 |
| End latitudeend_lat | 41.573 |
| End longitudeend_lon | -98.429 |
| Deaths directdeaths_direct | 0 |
| Deaths indirectdeaths_indirect | 0 |
| Injuries directinjuries_direct | 0 |
| Injuries indirectinjuries_indirect | 0 |
| Damage propertydamage_property | 0.00K |
| Damage cropsdamage_crops | 0.00K |
| Weather forecast office sourcewfo_source | Public |
| Episode narrativeepisode_narrative | Ending a lull of over two weeks without severe thunderstorms, this Saturday afternoon and early evening featured several reports of damaging winds, large hail and gustnadoes, primarily focused within southern and eastern counties of South Central Nebraska such as Webster, Clay, Nuckolls and Fillmore. During the height of the event between 4-7 PM CDT, some of the most significant wind damage occurred in the Hardy and Ruskin areas, where winds estimated to around 75 MPH overturned irrigation pivots, downed power poles and caved in several steel corn seed storage tanks. Also, 66-68 MPH wind gusts were measured near Deweese and at the York airport. Although several gustnadoes were reported in these areas, some of which resembled true tornadoes per storm chaser video, these were typically brief circulations focused along storm outflow and not directly associated with cloud base rotation. As for large hail, there were several reports of 1.5 to 2-inch diameter stones, including nearly 20 minutes of golf ball size hail east of Blue Hill. Very early in the event around 3 PM CDT, an elevated severe storm in far western South Central Nebraska dumped hail up to ping pong ball size northwest of Gothenburg. Rainfall-wise, although the progressive nature of most storms kept amounts under 2 inches, one localized corridor in far northern portions of the 24-county area between Spalding and Greeley tallied 3.28 inches from the cumulative effect of several passing storms. ||Breaking down event timing, the first severe storm of the day was the aforementioned elevated post-frontal hail storm that swept across western Dawson County around 3 PM CDT. This ended up being the only storm to reach severe criteria across the western half of South Central Nebraska, as the vast majority of severe weather occurred with surface-based storms erupting near the Highway 281 corridor between 4-5 PM CDT, and eventually exiting the area into eastern Nebraska between 7-8 PM CDT. These storms, which developed along a well-defined surface cold front, started out as three semi-discrete supercells. However, the supercells quickly morphed into a quasi-linear complex due to cell mergers and eastward-surging outflow boundaries in an environment characterized by surface temperature-dewpoint spreads around 20 degrees or greater. Behind the main line of surface based storms, a few severe post-frontal storms flared up near Highway 281 between 6-7 PM CDT, producing nickel to ping pong ball size hail in and just east of Grand Island. The last band of strong storms of the evening departed the Greeley and Nance County area around 9 PM CDT. ||On the synoptic scale this was a rather strongly forced severe weather event, as a vigorous shortwave trough migrated from eastern Colorado across southern Nebraska, while at the surface, a sharp north-south oriented cold front reached a position near the Highway 281 corridor by mid-afternoon. Mesoscale severe weather parameters around the time of initial surface-based supercell development included 40-50 knots of 0-6 kilometer vertical wind shear and 1500-2000 J/kg mixed-layer CAPE. Despite several reports of gustnadoes, a more substantial tornado threat was likely mitigated by somewhat meager boundary layer moisture with surface dewpoints only between 55-60F, resulting in higher cloud bases and enhanced outflow. |
| Event narrativeevent_narrative | A 24 hour rainfall total of 3.28 inches was reported southwest of Spalding by a Nebraska Rainfall Assessment and Information Network Observer. |
| Yearyear | 2,012 |
Provenance
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Storage: spine